Plate holder for cameras



(No Model.)

L. KOSS.

PLATE HOLDER FOR CAMERAS.

Patented June 1, 1886.

UNITED STATES PATENT OFFICE.

LUDVIG KOSS, OF NEiV YORK, N. Y.

PLATE-HOLDER FOR CAMERAS.

SPECIFICATION forming part of Letters Patent No. 342,914, dated June l,1886.

Application filed December 16, 1885.

To all whom it may concern:

Beit known that I, LUDWIG Koss, of the city, county, and State of NewYork, have invented certain new and useful Improvements in Plate-Holdersfor Cameras, of which the following is a speciication.

This invention has reference to an improved plate-holder forphotographic cameras, which is arranged to support plates of diiierentsize and center them in aconvenient manner, and the invention consistsof a plate-holder provided with transverse guide-rails and flanged plateholding clamps guided thereon, said clamps being acted upon byfrictionsprings, while springs at right angles press directly on theplate. The plate-holder is provided at the upper part with a recess forone of the plate-holding clamps, so that the same can be moved out ofthe way.

In the accompanying drawings, Figure l represents a front elevation of'a double plateholder for cameras. Fig. 2 is a vert-ical transversesection on line aux, Fig. l; Fig. 3, a horizontal section on line y y,Fig. l, and Fig. 4 a front view of the plate-holder shown with the coverdrawn out and a plate in position therein.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the frame of my improved plate-holder,which is provided with a fixed septum, B. To the septum B are appliedtransverse guide-rails C, on which are guided two adjustableplate-holding clamps, D D. The clamps D D are provided withoutwardly-bent iianges d, by which the clamps may be conveniently takenhold of for being applied to the plate. One of the clamps D may be movedinto and stored away in a recess, d', of the frame A, (shown in Fig. 4,)so as to facilitate the insertion of the (No model.)

ground-glass plate E and the proper centering of the same. The Shanks Dof the plateholding clamps are guided ou the rails O and acted upon bythe ends of a band-spring, D`, so as to be securely held in position onthe rails. A second bandspring, D, is arranged at right angles to thespring D2 and pressed upon the plate E, so as to hold the same ii rmlyin position in the clamps D. A sliding cover, F, closes the plate-holderin the usual manner.

My improved plate-holder has the advair tage that plates of differentsizes can be supported without any kid-frame, and that the same can becentered quickly and conveniently. The plate-holder can also be madecheaper than the plate-holders with wooden kids, which require carefulfinishing. The plate-holder can be made single or double and can be usedwith plates of dili'erent sizes.

Having thus described my invention, I claim as new and desire to secu reby Letters Patentl. The combination of a supportingframe, transverseguide-rails, adjustable plate-hold ing clamps guided on said rails, andbandsprings pressing on the clamps and plate, substantially as setforth.

2. The combination of the supporting-frame having a recess in one edgethereof, transverse guide-rails, adjustable plate-holding clamps guidedon said rails and having outwardly bent ends, and band-springs pressingon the shanks of the clamps and the plate, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

LUDVIG KOSS.

Vitnesses:

PAUL GoEPEL, CARL KARP.

